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How to calculate the multiplication and division method with letters? For example, 2 m times 2 m, 2 / 3 m times 3 m, 1 / 3 m divided by 2 m
In division, consider whether M is 0, direct multiplication, multiplier, letter multiplication, 2m * 2m = 4m ^ 2 2 / 3M * 3M = 2m ^ 2 1 / 3m / 2m = 1 / 6
If in the product of (x-2m) (x + 1 / 3), there is no linear term of the letter X, then the value of M is
-2m+1/3=0,m=1/6
M + 2m-10 + 2 / 2 2m-10
m+2m-10+2m/2-10=4m-20
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